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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">tumors</journal-id><journal-title-group><journal-title xml:lang="ru">Malignant tumours</journal-title><trans-title-group xml:lang="en"><trans-title>Malignant tumours</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2224-5057</issn><issn pub-type="epub">2587-6813</issn><publisher><publisher-name>Rosoncoweb</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18027/2224-5057-2020-10-29-34</article-id><article-id custom-type="elpub" pub-id-type="custom">tumors-718</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL REPORTS</subject></subj-group></article-categories><title-group><article-title>Влияние неоадъювантной терапии на экспрессию молекулярных маркеров в ткани желудка</article-title><trans-title-group xml:lang="en"><trans-title>Influence of neoadjuvant therapy on the expression of molecular markers in gastric cancer</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Спирина</surname><given-names>Л. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Spirina</surname><given-names>L. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Людмила В. Спирина, д. м. н., старший научный сотрудник лаборатории биохимии опухолей «Томский национальный исследовательский медицинский центр Российской академии наук», профессор кафедры биохимии и молекулярной биологии с курсом клинической лабораторной диагностики «Сибирский государственный медицинский университет»</p><p>Томск</p></bio><bio xml:lang="en"><p>Liudmila V. Spirina, MD, PhD, DSc, Leader Researcher, Laboratory of Tumor Biochemistry, Tomsk National Research Medical Center of the Russian Academy of Sciences, Professor of the Department of Biochemistry and Molecular Biology with a Course in Clinical Laboratory Diagnostics, Siberian State Medical University</p><p>Tomsk</p></bio><email xlink:type="simple">spirinalvl@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Августинович</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Avgustinovich</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александра В. Августинович, к. м. н., старший научный сотрудник отделения абдоминальной онкологии</p><p>Томск</p></bio><bio xml:lang="en"><p>Aleksandra V. Avgustinovich, MD, PhD, Leader Researcher, Department of Abdominal Oncology</p><p>Tomsk</p></bio><email xlink:type="simple">aov862@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Афанасьев</surname><given-names>С. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Afanasiev</surname><given-names>S. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Г. Афанасьев, д. м. н., профессор, заведующий отделением абдоминальной онкологии</p><p>Томск</p></bio><bio xml:lang="en"><p>Sergey G. Afanasiev, MD, PhD, DSc, Prof, Head of Department of Abdominal Oncology</p><p>Tomsk</p></bio><email xlink:type="simple">afanasievsg@oncology.tomsk.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Волков</surname><given-names>М. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Volkov</surname><given-names>M. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Максим Ю. Волков, к. м. н., врач отделения абдоминальной онкологии</p><p>Томск</p></bio><bio xml:lang="en"><p>M. Yu. Volkov, MD, PhD, oncologist of Department of Abdominal Oncology</p><p>Tomsk</p></bio><email xlink:type="simple">dok75-75@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научно-исследовательский институт онкологии, ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук»; ФГБОУ ВО «Сибирский государственный медицинский университет» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Cancer Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences; Siberian State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Научно-исследовательский институт онкологии, ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Cancer Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>16</day><month>10</month><year>2020</year></pub-date><volume>10</volume><issue>1</issue><elocation-id>29‑34</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Спирина Л.В., Августинович А.В., Афанасьев С.Г., Волков М.Ю., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Спирина Л.В., Августинович А.В., Афанасьев С.Г., Волков М.Ю.</copyright-holder><copyright-holder xml:lang="en">Spirina L.V., Avgustinovich A.V., Afanasiev S.G., Volkov M.Y.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.malignanttumors.org/jour/article/view/718">https://www.malignanttumors.org/jour/article/view/718</self-uri><abstract><p>Рак желудка (РЖ) остается одной из ведущих причин смерти от злокачественных новообразований. Известно, что его патогенез представляет собой многоступенчатый и гетерогенный процесс с широким спектром генетических изменений. Среди ведущих механизмов выделяют нарушение регуляции важнейших сигнальных путей клетки, что определяет нарушения клеточного цикла, дифференцировки клеток, процессов репарации ДНК, апоптоза и ведет к развитию злокачественной опухоли.</p><sec><title>Цель работы</title><p>Цель работы: исследование экспрессии компонентов AKT/m-TOR сигнального пути и AMPK в ткани опухоли у больных раком желудка на фоне химиотерапии по схеме FLOT.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В исследование было включено 24 больных раком желудка. Пациенты получали комбинированное лечение, включающее неоадъювантную химиотерапию по схеме FLOT, хирургическое вмешательство. Материалом исследования была нормальная и опухолевая ткань, полученная при проведении диагностической гастроскопии у пациентов. Уровень мРНК изучаемых показателей определялся методом ПЦР в реальном времени.</p><p>Результаты и их обсуждение. Значимые изменения происходили при исследовании уровня показателей после лечения. Отмечено, что на фоне неадъювантной терапии происходит снижение экспрессии 4EBP1 в 2,2 раза по сравнению с его уровнем до начала лечения. При этом эффект лечения был связан с комплексом показателей, позволяющих предсказывать его еще до начала комбинированной терапии. Отмечено снижение экспрессии 4EBP, mTOR и AMPK по мере уменьшения эффекта терапии в группах пациентов с полной регрессией, частичной регрессией, стабилизацией и прогрессированием заболевания.</p></sec><sec><title>Заключение</title><p>Заключение. Снижение экспрессии 4EBP1 выявлено в ткани рака желудка под влиянием неоадъювантной терапии. Молекулярные маркеры, способные предсказывать развитие резистентности к противоопухолевой терапии, связаны с особенностями AKT/mTOR сигнального пути. Изначально высокая экспрессия AMPK, mTOR и 4EBP1 является ключевым событием, опосредующим развитие эффекта неоадъювантной терапии при раке желудка.</p></sec></abstract><trans-abstract xml:lang="en"><p>Introduction. Gastric cancer remains the leading cause of death from malignant neoplasms. Its pathogenesis is known to be a multistage and heterogeneous process with a wide range of genetic changes. Among the leading mechanisms, the dysregulation of the most important signaling cell pathways is distinguished, which determines the disruption of the cell cycle, cell differentiation, DNA repair, and apoptosis processes and leads to the development of gastric cancer. This work aimed to study the expression of the AKT/mTOR and AMPK signaling pathway components after the FLOT chemotherapy in patients with gastric cancer.Material and methods. The study includes 24 patients with gastric cancer. The patients received combined treatment, including neoadjuvant chemotherapy (FLOT) and surgical resection of the stomach. Specimen contained normal and tumor tissues obtained during diagnostic gastroscopy of patients. The mRNA level of the studied parameters was determined by real‑time PCR.Results. Significant changes occurred when examining the level of indicators after treatment. Against the background of non‑adjuvant therapy, there was a decrease in 4EBP1 expression by 2.2 times compared to its level before surgery.The effect of the treatment was associated with a set of indicators. They allow predicting the impact of therapy. There was a decrease in the expression of 4EBP, mTOR, and AMPK as the effect of treatment decreased in groups of patients with complete regression, partial regression, stabilization and progression of the disease.Conclusion. A decrease in 4EBP1 expression was found in gastric cancer tissue under the influence of neoadjuvant therapy. Molecular markers that can predict the development of resistance to antitumor therapy are associated with the features of the AKT/mTOR signaling pathway. The initially high expression of AMPK, mTOR, and 4EBP1 is a key event mediating the development of the neoadjuvant therapy effect in gastric cancer.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>рак желудка</kwd><kwd>молекулярные маркеры</kwd><kwd>неоадъювантная терапия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gastric cancer</kwd><kwd>molecular markers</kwd><kwd>neoadjuvant therapy</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Sohn BH, Hwang JE, Jang HJ, Lee H-S, Oh SC, Shim J-J, et al. Clinical Significance of Four Molecular Subtypes of Gastric Cancer Identified by The Cancer Genome Atlas Project. 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